Abstract
We report the results of the first search for the decay using of data collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. We observe no significant signal and set a 90% confidence-level upper limit of on the branching fraction of this decay.
- Received 20 June 2021
- Accepted 23 July 2021
DOI:https://doi.org/10.1103/PhysRevD.104.L031101
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Published by the American Physical Society